Initial commit
Add spiff
Add spiff-destructuring
Add element-lengths
Add second-elements
Add titles
Add books-by-author
Fix the books-by-author test
Add book-titles-by-author
Add author-names
Fix author-names test.
Add authors
Add books->author-names
Add toggle.
new exercise: cutify
New exercises: thinking with boxes
Added missing function stubs and tests
Added lazytest to project.clj
fix: height and width were mixed up
New exercise: square?